Modal Participation - Study

After plotting modal/panel participation curves, perform a Partial sum or Contributor overlay response study.

Frequency range

Indicates the available range, based on your PFMODE.PCH or .f06 file.

Type

The type of response study.

Partial sum study

Select a number of contributors to exclude from the response, with an optional percentage to exclude.

Contributor overlay

Select specific contributors to overlay with the response.

Randomization

Select modes/panels for randomization.

% to Exclude

Optional field that allows you to exclude a percentage of the contributors from the response.

Randomization Options

These options are active only when the Randomization option is chosen from the Type drop-down menu. You can enter the number of randomization runs in addition to the magnitude and phase for the randomization of modes/panels.

Select contributor(s) to:

Select the mode/panel or modes/panels that you want to exclude or include in the response study.

• Click to select the entire list of contributors.
• Click to deselect your current selections.
• Click exchange the currently selected contributors for the unselected contributors in the list.

Show difference curve as

Shows the difference between the original curve and the partial sum curves.

To determine how the difference curve is displayed, select % of Response or Select same as Response from the drop-down menu.

Display Options

Launches the Display Options dialog, which allows you to customize the response study plot, including scale, weighting, and the plot layout.

Display

Click Display to display the response study plot once your selections are complete.